What are the specs for this Limit Switch?

The correct replacement for Goodman model AMSS921005CNAA — 10123539 is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number AMSS921005CNAA — 10123539.

What symptoms indicate I need a new limit switch?

Common symptoms that indicate you need a new limit switch include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this limit switch compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman Manual Reset Limit Switch for AMSS921005CNAA — 10123539

Name: OEM Goodman Manual Reset Limit Switch for AMSS921005CNAA — 10123539
Brand: Goodman
SKU: GOODMAN-7485
Price: 6.95 USD
Availability: InStock

SKU: GOODMAN-7485 Brand: Goodman

$6.95 $8.99

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The Goodman 10123539 Manual Reset Limit Switch is a genuine OEM high-limit safety control engineered for the AMSS921005CNAA gas furnace and other Goodman/Amana models on the same platform. This switch monitors heat-exchanger temperature and interrupts the ignition sequence if the furnace overheats, protecting the equipment and your home. Because it is a manual reset device, it will not automatically re-close after a trip — a technician must inspect the cause and press the button to restore operation, which is exactly the fail-safe behavior the furnace's safety circuit is designed around.

Specifications

Type: Manual reset high-limit (temperature) switch
OEM Part Number: 10123539
Function: Overheat safety cutoff / flame rollout protection
Reset: Manual push-button
Fit: Goodman / Amana furnaces including AMSS921005CNAA
Equipment: Gas furnace

OEM vs. Generic

This is the genuine OEM Goodman part, calibrated to the exact trip temperature specified for your furnace. Universal or generic limit switches often carry a different trip point or bracket geometry, which can cause nuisance shutdowns or, worse, fail to trip when needed. For a safety-critical component like this, we recommend the OEM part for guaranteed calibration and fit.

Installation Difficulty

Easy (2/5). Typically a two-wire, single-screw replacement. Always shut off power and gas at the furnace before servicing. If the switch has tripped, diagnose and correct the underlying overheating condition (dirty filter, blocked airflow, failed blower) before returning the unit to service.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman Manual Reset Limit S...

$6.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMSS921005CNAA — 10123539?

Yes. This is the factory-specified OEM limit switch for the Goodman AMSS921005CNAA — 10123539. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the limit switch on my Goodman AMSS921005CNAA — 10123539?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new limit switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this limit switch compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman limit switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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